<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @subpackage Object
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Ean8.php 23775 2011-03-01 17:25:24Z ralph $
 */

/**
 * @see Zend_Barcode_Object_Ean13
 */
require_once 'Zend/Barcode/Object/Ean13.php';

/**
 * @see Zend_Validate_Barcode
 */
require_once 'Zend/Validate/Barcode.php';

/**
 * Class for generate Ean8 barcode
 *
 * @category   Zend
 * @package    Zend_Barcode
 * @copyright  Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Barcode_Object_Ean8 extends Zend_Barcode_Object_Ean13 {
	
	/**
	 * Default options for Postnet barcode
	 * @return void
	 */
	protected function _getDefaultOptions() {
		$this->_barcodeLength = 8;
		$this->_mandatoryChecksum = true;
	}
	
	/**
	 * Width of the barcode (in pixels)
	 * @return integer
	 */
	protected function _calculateBarcodeWidth() {
		$quietZone = $this->getQuietZone ();
		$startCharacter = (3 * $this->_barThinWidth) * $this->_factor;
		$middleCharacter = (5 * $this->_barThinWidth) * $this->_factor;
		$stopCharacter = (3 * $this->_barThinWidth) * $this->_factor;
		$encodedData = (7 * $this->_barThinWidth) * $this->_factor * 8;
		return $quietZone + $startCharacter + $middleCharacter + $encodedData + $stopCharacter + $quietZone;
	}
	
	/**
	 * Prepare array to draw barcode
	 * @return array
	 */
	protected function _prepareBarcode() {
		$barcodeTable = array ();
		$height = ($this->_drawText) ? 1.1 : 1;
		
		// Start character (101)
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		
		$textTable = str_split ( $this->getText () );
		
		// First part
		for($i = 0; $i < 4; $i ++) {
			$bars = str_split ( $this->_codingMap ['A'] [$textTable [$i]] );
			foreach ( $bars as $b ) {
				$barcodeTable [] = array ($b, $this->_barThinWidth, 0, 1 );
			}
		}
		
		// Middle character (01010)
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		
		// Second part
		for($i = 4; $i < 8; $i ++) {
			$bars = str_split ( $this->_codingMap ['C'] [$textTable [$i]] );
			foreach ( $bars as $b ) {
				$barcodeTable [] = array ($b, $this->_barThinWidth, 0, 1 );
			}
		}
		
		// Stop character (101)
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (0, $this->_barThinWidth, 0, $height );
		$barcodeTable [] = array (1, $this->_barThinWidth, 0, $height );
		return $barcodeTable;
	}
	
	/**
	 * Partial function to draw text
	 * @return void
	 */
	protected function _drawText() {
		if ($this->_drawText) {
			$text = $this->getTextToDisplay ();
			$characterWidth = (7 * $this->_barThinWidth) * $this->_factor;
			$leftPosition = $this->getQuietZone () + (3 * $this->_barThinWidth) * $this->_factor;
			for($i = 0; $i < $this->_barcodeLength; $i ++) {
				$this->_addText ( $text {$i}, $this->_fontSize * $this->_factor, $this->_rotate ( $leftPosition, ( int ) $this->_withBorder * 2 + $this->_factor * ($this->_barHeight + $this->_fontSize) + 1 ), $this->_font, $this->_foreColor, 'left', - $this->_orientation );
				switch ($i) {
					case 3 :
						$factor = 4;
						break;
					default :
						$factor = 0;
				}
				$leftPosition = $leftPosition + $characterWidth + ($factor * $this->_barThinWidth * $this->_factor);
			}
		}
	}
	
	/**
	 * Particular validation for Ean8 barcode objects
	 * (to suppress checksum character substitution)
	 * @param string $value
	 * @param array  $options
	 */
	protected function _validateText($value, $options = array()) {
		$validator = new Zend_Validate_Barcode ( array ('adapter' => 'ean8', 'checksum' => false ) );
		
		$value = $this->_addLeadingZeros ( $value, true );
		
		if (! $validator->isValid ( $value )) {
			$message = implode ( "\n", $validator->getMessages () );
			
			/**
			 * @see Zend_Barcode_Object_Exception
			 */
			require_once 'Zend/Barcode/Object/Exception.php';
			throw new Zend_Barcode_Object_Exception ( $message );
		}
	}
}
